Machine for setting or driving rivets and the like



June 29, 1943. w. c. DENT MACHINE FOR SETTING OR DRIVING RIVETS AND THE LIKE Filed July 25, 1941 5 Sheets--Sheetl l en N A ik #um fom ATTORNEY June 29, 1943.

w. c. DENT MACHINE FOR SETTING OR DRIVING RIVETS AND THE LIKE Filed July 25, 1941 5 Sheets-Sheet 2 June 29, 1943.

MACHINE 'FOR SETTING OR DRIVING `RIVETS AND THE LIKE 3 Sheets-Sheet 3 Filed July 25, 1941 Patented June 29, 1943 UNITED STATES PATENT OFFICE MACHINE FOR SETTING OR DRIVING RIVETS AND THE LIKE Application July 25, 1941, Serial No. 404,015 In Great Britain July 26, 1940 6 Claims.

This invention relates to machines for setting or driving rivets and the like, being of the kind in which the said rivets or the like are fed in succession to a pocket or holding device for operation upon by a setting or 'driving tool.

The object of the present invention is to provide a riveting or like machine, designed for use particularly with Very short rivets or the like, wherein provision is made for the visible location of the work in relation to the rivets, so as to ensure said rivets properly entering the holes provided for their reception in the work components to be joined.

According to the invention, in a riveting Vor like machine, of the kind referred to, the work is visibly located by means of a locating .pin or projection (which may be rotatable) visibly situated above the work and not forming part of the rivet or like setting or driving tool. The locating pin or projection is adapted to be visibly lowered into the holes in the work and then raised and moved out of the way while the seting tool descends.

Also according to the invention, a riveting or like machine, of the `kind referred to, comprises a vertically-movable slide or member having pivoted to it an angularly-1novab1e member carrying a locating projection and a rivet or 4like receiving pocket either of which is adapted vto be brought into operative position in relation to the work. The locating projection is adapted first to be brought into position and lowered to locate the work and then, after said projection has been raised, the angularly-movable member is adapted to be turned to bring the pocket into t for example, be initially lowered to take the lo-V' cating ,projection into the holes of the work `by means of a pedal that controls the clutch of the machine. It may then be raised by a cam and subsequently lowered to take the pocket to the work by a cam on the ram-operating mechanism, being again raised, after setting of the rivet, by a spring or other means.

As the locating projection is lowered, a clamp device is also lowered to clamp thework components, and it may be held in clamping position by a suitable retaining device.

Figure 1 of the accompanying `drawings is a vertical sectional elevation of a riveting machine in accordance with the present invention, the ram and tool being shown raised.

Figure 2 is a fragmentary elevation showing the cams of the toggle block .in operation when the ram `is lowered. i

Figure 3 is a horizontal section ,on line III-III, Figure 1. Y i i Figure 4 isa front elevation, on a larger scale, `showing the angularly-movable member carrying the locating pin Aand pocket, when in a position with the locating pin operative over the work.

Figure 5 is a similar view when the said angularly-movable member 4has been :swung 4over to bring the pocket into operative position.

Figure .6 isa sectional vview showing the pocke opened after the setting tool has descended.

Figure '7 is a side elevation of the .pedal-,operated mechanism for lowering the" locating pin,

and of the cam that controls said mechanism.

Figure 8 is a` section on line WIL-VIII, Figure 4, showing the pocket inplan. y

Figure 9 is a vertical section on line IX-IX, Figure 4, showing the spring plunger device for indexing the Aswinging frame member carrying the locating pin and pocket.

Referring to the said drawings, the riveting `machine therein shown comprises a headV frame having two spaced sideplates or cheeks vI between which a giude block 2 is fixed. A vertically slidable ram 3 is guided within the forward end of the block 2 and carries the setting tool 4 which cooperates with a stationary anvil '5 situated below the head and upon which the work 6 is placed. I'he ram 3 may conveniently be opn erated 'by toggle mechanismcomprising upper and lower pairs of links "l, 8, pivoted to a central member 9 coupled by a connecting-rod Ill to a crank II on the main shaft I2 of the machine, the upper links 'I `being pivotally lanchored to a top block I3 fixed between the head side plates I and the lower links being `pivoted to the ram 3.

Below the guide block 2 `is a verticaily-movable slide consisting of a plate I4 carrying vertical gulde pins I5 slidable in guide holes in said block 2. Upon the underside of this slide I4 are two `diarnetrically-opposite depending lugs or brackets` I6, Il, between which is pivoted, at I8, I8, a frame I9 of inverted `U-shape carrying a locating pin 29. This pin may simply ybe plain shank, but, as shown, it may take the form ofa ydrill operated by lpneumatic or other means,

the drill casing a from which it is driven being attached to the underside of the pivoted frame I9. This drill may be used for locating the work as well as for clearing out and aligning the holes in the two work components to ensure that the rivet can subsequently be properly fitted into the holes. The pivoted frame I9 is provided at one side with a lateral arm or bracket 2l which, when the frame I9 is vertical (Figure 4) extends upwardly and obliquely, and to which is attached a rivet-receiving pocket device consisting of a pair of levers 22 pivoted at 23 to the arm or bracket 2l and tending to bo closed together by a spring 24, the levers carrying at their outer ends inwardly-projecting short arms or jaws 25 recessed at their ends to receive the head of a rivet 23 between them. When the pivoted vframe I9 is vertical and the slide i4 is raised (Figure 4), the pocket is lifted to a position in which the jaws 25 are adjacent the end of a chute 21 (Figure 4) descending lfrom a rivet hopper, so that the pocket can receive a rivet from the chute, the' jaws being slightly opened. by the levers 22 engaging a fixed cone 28; and in this position the locating pin Zilis above the work and anvil. By turning the pivoted frame I9 an'- gularly, the pocket device 22, 25, can be swung into a depending vertical position over the holes y in the work, as in Figure 5, the locating pin 2|) then being raised angularly into an inoperative position. The pivoted frame I9 is adapted to be retained in one or other of the two positions, Ywith either the locating pin or the pocket in an operative position, by'a suitable holding or indexing device, such as a spring plunger 29 (Figure 9) on'the frame I9 engaging one or other of two spaced holes or recesses 30, 3I, in the bracket or lug I1 'on the slide.

The slide is adapted to be lowered initially, to take the locating lpin to the work, by the operation of a pedal which also controls the clutch of the machine. This pedal is connected through a yielding coupling device to a bellcrank lever 32 (Figure l.) mounted on one side of the frame and y'having a horizontal arm connected, by a vertical link 33, t0 a vertical rod 34 extending .upwardly from the pocket and locating-pin sli-de I4, so that the operation of the pedal depresses said slide, the work .being located, during this operation, so that the pin20 enters the holes in the work components. The pedal mechanism and yielding coupling device may be as described in my application Serial No. 404,016, the pedal heing connected by a cable 35 to a vertically-moving slide 35 (Figure 7) mounted in a guide in a lever 31 normally Vheld rigidly in a Vertical position by a bell-crank 38 connected by a link39 to lever 31 and supported against the nose 40 of a cam 4I which, when the clutch is engaged, is operated to cause the said vertical lever 31 to he released or collapsed.y The pedal-operated slide 35 carries a V-shaped nose-piece 42 which engages over the curved upper end of another slide 43 mounted in guides in the rear face of an upstanding lever 44 supported against a spring 45 bearing upon an abutment 46, the spring being sufliciently strong to ensure the second slide 43 being drawn downwards by the rst slide 35 for normal lowering of the locating-pin but I yielding, to allow the one slide to move over the other, in the event of the locating pin failing to enter the holes of the work due to faultyY location. lThe slide 43 on the spring-supported lever 44 is connected by a cable 41 passing across the machine to the bell-crank lever 32 that operates the pocket and locating-pin slide I4.

The means whereby the pedal throws in the clutch of the machine may also be as described in my application Serial No. 404,016 or it may comprise any other suitable mechanism,

During the initial descent of the main slide and locating pin, a clamping device is lowered to hold the work components together during subsequent riveting. For this purpose, the rod 34 on the main slide I4 has a horizontal arm 48 bearing, through the medium of a spring 49, upon the upper end of a vertical slide 50 the lower end of which terminates in a horizontal clamping ring or frame 5I lying over the work. As the bell-crank lever 32 and rod 33 are operated to lower the main slide i4, the arm 48 presses the clamping ring on to the work with a yielding pressure and against the action of a spring 52 tending to raise the clamping ring. vWhen thus lowered, the clamp slide is held in this position by a spring plunger or catch device 53 (Figure 4) engaging a recess 54 in the slide.

When the machine is in operation, the pedal control is thrown out of operation by the collapsing of the lever 31 carrying the pedal-operated slide 36, as above described, the locating pin 20 having entered the holes in the work. The clutch is then engaged and the machine started and a cam 55 (Figure 1) then comes 'into operation to raise the main slide vI4 and to withdraw the said pin. This cam 55, which is onthe main shaft I2, acts on the arm 56 of a bell-crank lever that is connected by a link 51 Vto the vertical arm of the 4main bell-crank lever 32 which operates the main'slide, The arm 56 is in the path of the cam 55 owing to thel forward movement of lever 32 and thus the slide I4 is caused toy be raised, although the clamp 5I remains pressed upon the work by reason oi' the catch device 53. As the main slide is thus raised the frame I9 is arranged to be swung over to cause the pocket jaws 25 to come into a vertical position in alignment with the located holes in the work. For

this purpose the member 9 of the toggle mechanism (Figure 1) has one end'of a telescopic link A58 connected to it, the linkcontaining a compression spring 59 and its other end being pivoted to the upper end of a vertical slide 60 the lower end of which projects below the slide plate I4, being connected by a link 6I to a tail-piece or arm 62 on the frame I9. As the ram 3 vis descending while the slide I4 is rising the toggle member 9 moves downwards in an oblique direction and through the telescopic spring link 58 causes the slide 50 to move downwards and, by means of the lower link 5I, causes the kframe I9 to be swung over from the position in Figure 4 to the position in Figure 5, bringing the pocket over the work, the frame being held in this position by the plunger ,29 engaging the indexing hole 3|. A spring 63 tends to raise the slideV 60.

As the ram continues to descend the spring 59 in link 58 is further compressed and the pocket is lowered on to the work to take therivet into the holes. For this purpose the toggle member V9 carries a cam 64 which, as said member moves obliquely downwards, engages Ya projection 65 on the rod 34 (Figures 1 and 2) and thereby lowers the slide I4 and thepo-cket thereon, causing the rivet to enter the holes in the work. As the tool 4 approaches the bottom of its stroke, a conical enlargement 6E onthe tool'shank (Figure 6) engages cam Vprojections 61 on the pocket lasz'aroio levers 22 and thereby separates the pocket jaws to 'rel'easethe rivet, as described in my applicaltiolfiSerial No. 404,016. The'tool then effects the usetting of tne'rivet and at A about 'the same time another cam 68 on thetoggle member 9 engages an arm 69 on the catch plunger 53 (see Figures l1,'21and 4) so as to withdraw 'the latter .from v .the notch 154 in the clamp slide '5U which is y'thus gfreeto be raised by its spring 52.

W As theram-rises `after the Vsetting of the rivet,

Athe slide l is -ra'ised'by means of springs 10 `'connecteur between' pins lil in the sides of the slider-md pirlsy`12v onv the :side plates l -of tne machine ns it j'rises and the telescopic link 58 eirtendsyth'e spring 63f=lifts `the slide G0 and `the linlrrl throws overthe framels to the posiftion shown in Figure 4, with the locating pin `2Din position `for thenext operation.

" Briefly, the sequence of operations is as follows: the locating pir-112D bein'gin operative position (Figure 745), the 'main slide I4 is lowered 'by the pedal to locate the work. The cam "55 comes into `operation to raise the slide H and pin 29, 4and the link 58 and slide 60 acton the pivoted -Ypocket and locating-'pin frame I9 toswing 'it lover and bring the pocket'in-to' position' (Figure '5). The slide M is then loweredby the Cam 64 on 'the' toggle mechanism to inse'rt'the `rivet into the work, and the setting tool 4 descends-on to the rivet to setthe saine.V V"-Ihe slide is next raised fr ill() fic The clamp 5I is lifted by its spring 52 as the ram rises.

I claim:

1. A machine for setting rivets and the like comprising a setting tool, an anvil upon which the work is placed, a vertically movable slide, a displaceable member mounted on said slide, a locating projection and a rivet or like receiving pocket mounted on said member, means for operating said member to bring either the locating projection or the pocket into operative position over the anvil and work, a clutch for starting the machine, a pedal controlling the clutch to start the machine but being inoperative upon the clutch during its initial movement, a sliding member connected to the pedal and having an inclined nose part, a lever upon which the sliding member is mounted, a second sliding member engaged by the inclined nose part of the rst sliding member, a cam normally supporting the lever until the clutch is engaged and the machine is started but moving into an inoperative position after engagement of the clutch to render the pedal inoperative upon the second sliding member, a lever connected to the second sliding member and operative upon the vertically-movable slide whereby the initial operation of the pedal causes the slide to descend, before the clutch is engaged, for lowering the locating projection, when in operative position, into holes in the work, means operated by the machine for raising the locating projection from the work, means operated by the machine for operating the displaceable member to bring the pocket into operative position, mechanical means, for loweringV the pocket to the work, means for lowering `the setting tool on to the work, means forlraising the pocket, and meansfor again operating the dis-` Cil pia-eeable member to bring thelocating projecition into operative position. l l V.21..A'machine for setting rivets and the like comprising a setting tool, an anvil on which the work is placed, a vertically-movable slide, a pivoted `member mounted on said slide, a locating projection yand arivet or like receiving pocket on said pivoted member, mesms for operating the pivoted member to bring either .the llocating projection or Ytlle'pocket in operative position over the l`'anvil and work, la clutch forstarting the machine, a :pedal operative on the clutch only during 'its nalmovement for startingthe machine, aslding vmember connected to the pedal and yhaving an inclined surface, a lever upon which the sliding memberis mounted, a second sliding member engaged by the inclined surface of `the 'ist sliding member, a `cam normally supporting Vthe saidlle'ver until theclutch is engaged and the machineis' 4started "but then moving into an inoperative position to render the pedal inoperative upon the second sliding member, a spring-supported llever carrying 'the second` slide said l lever yieldi'ng if the resistance tothe .pedal exceeds a v predetermined valuaalever connected to the second sliding member and operative upon the vertically-movable slide for lowering vthe locating .projedt'iomwhen in operative position, into holes in the work, and means for raising the locating `proiec'tibri from the'wrk.

3. -A-vmachine for `setting rrivets and vthe `like comprising a main shaft, a setting tool driven from the main shaft, an anvil upon which the work is placed, a vertically-movable slide, a pivoted member on the slide, a locating projection and a rivet or like pocket on the pivoted member, means for operating the pivoted member to bring either the locating projection or the pocket into an operative vertical position over the anvil and work, a clutch for starting the machine, a pedal operative on the clutch only during its nal movement for starting the machine, means operated by the initial movement of the pedal for lowering the slide when the locating projection is in operative position to take said projection into holes in the work, means for rendering the pedal inoperative-on the slide when the clutch is engaged, a cam on the main shaft of the machine acting on the slide to raise the locating projection from the work, mechanical means for automatically bringing the pocket into operative position when the slide is raised, means for lowering the slide and pocket, means for raising the slide and pocket after setting of the rivet, and automatic means for nally bringing the locating projection into operative position.

4. A machine for setting rivets and the like comprising a main shaft, a ram, means for operating the ram, a setting tool carried by the ram, an anvil upon which the work is placed, a vertically-movable slide, a pivoted member on the slide, a locating projection and a rivet or like receiving pocket on the pivoted member, means for operating said pivoted member to bring either the locating projection or the pocket into an operative vertical position, a clutch, a pedal operative upon the clutch only 'duringits rlnal movement for starting the machine, means operated by the pedal only during its initial movement for lowering the slide when the locating projection is in operative position to take said projection into holes in the work, means whereby the pedal is rendered inoperative upon the slide when the machine has been started, a cam on the main 1 shaftof the machine acting on the slide to raise the .locating projection from the work, means for bringing the pocket into operative position,a cam on the ram-operating mechanism for lowering the slide and pocket, and means for raising the pocket after setting of the rivet.

. 5. A machine for setting rivets and the like comprising a setting tool, an anvil on which the work is placed, a vertically-movable slide, a pivoted member mounted on said slide, a. locating projection and a rivet-or like receiving pocket on said pivoted-member, means for operating said pivoted member to bring either the locating projetcion or the pocket into operative vertical position over the anvil and work, means controlled by the operator for lowering the slide when the locating projection is in operative position to Vtake said projection into holes in1the work, a work clamping device, means operated by the lowering of the slide for depressing said `clamping device upon the work, catch means for retaining said clamping device in its depressed position, means for raising the slide, means for bringing the pocket into operative position, means for lowering the slide to take the pocket to the work, means for operating the setting tool to set the rivet or the like, means for releasing the catch means holding the clamping device when the rivet is set, and spring means for raising the clamping device.

6. A power-driven machine for driving or. setting rivets and the likecomprising a vertically- `reciprocating setting or driving tool, an anvil upon which the work is placed, a vertically-movable slide, an angularly-movable member pivoted to said slide, a locating projection on said angularly-movable member, a rivet or like receiving pocket also on said angularly-movable member either the locating projection or the pocket being adapted to take a position over the anvil and work, a clutch for starting the machine, a pedal controlling the clutch, means whereby the initialv movement of the pedal lowers the slide when the locating projection is over the anvil and before the clutch is engaged in order to take said projection into pre-formed holes in the work, means whereby further operation of the pedal engages the clutchand starts the machine, means operated by the machine whereby the pedal is then rendered inoperative upon the slide, means whereby the machine then causes the slide to rise, means operated bythe machine to cause the angularly-movable member to be swung over when the slide rises in orderl to bring the pocket into operative position, means for mechanically lowering the slide to cause the pocket to take a rivet into the work, means for causing the descent of the setting tool, means for again raising the slide, and means for turning the angularly-movable vmember to bring the locating projection into operative position.

WILLIAM CARLYLE DENT. 

